Sony is all geared up for its upcoming presentation at the massively awaited Mobile World Congress (MWC) 2014. While the company, at last year's event, unveiled the Tablet Z, it is rumored yet to again to introduce a brand new flagship device dubbed as Sirius, alongside an tablet offering called Castor.

Sony's press event is set to take place at 08:30 CET/01:30 ET on Monday, February 24. Interestingly enough, that's the same day when Samsung's Unpacked event has also been scheduled, with the expected unveiling of the Galaxy S5 announced.

While everything here is still in a state of rumor and has to be taken with a pinch of salt, there's no confirmation that the company will actually release such a device. And if the last MWC is taken into consideration, Sony's didn't release any smartphones then as well. Maybe this time it will be different.

As far as the rumored devices are concerned, the Sirius is said to arrive running the latest Android KitKat. Moreover, according to a previous Xperia Blog report, the Sirius (Sony D6503) is said to support 4K video recording and support for Timeshift video.

It stated that the Timeshift "will allow you to record in a high frame rate which you can then apply slow motion effects to. We imagine this is something similar to slow motion video on the iPhone 5S, which captures video at 120 frames per second in 720p, with slow-mo effects added after."

The Castor Tablet, on the other hand, was leaked when it popped up in the Indonesian Postel Regulatory website last year.

"We would expect the SGP521 to be the 2014 LTE update to the Xperia Tablet Z (SGP321). This means we now count seven new Sony Xperia devices for 2014 so far, which includes one tablet. A number of these model numbers have appeared in the AnTuTu benchmark," another report added.

Now it is to be seen if the devices indeed make an appearance at the MWC 2014, or if Sony fans will again leave empty handed, in terms of information.